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Related Concept Videos

Alkyl Halides02:45

Alkyl Halides

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Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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Mass Spectrometry: Alkyl Halide Fragmentation01:22

Mass Spectrometry: Alkyl Halide Fragmentation

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Chlorine isotopes exist as 35Cl and 37Cl in a 3:1 ratio, while bromine isotopes exist as 79Br and 81Br in a 1:1 ratio. The mass spectrum of alkyl halides typically produces two distinct molecular ion peaks, the molecular ion peak, [M], and the molecular ion plus two, [M + 2] peak. The relative heights of these two peaks are proportional to the isotopic abundance ratios of the halide. For example, 2‐chloropropane and 1‐bromopropane display two peaks with relative peak heights in a 3:1 and...
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Halogens03:01

Halogens

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Group 17 elements, known as halogens, are nonmetals. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine a solid. Astatine is a highly unstable radioactive element, so currently, most of its properties are unknown due to its short half-life. Tennessine is a synthetic element also predicted to be in this group. 
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Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

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Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin,...
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Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship01:29

Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship

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Indirect-acting cholinergic agonists are agents that interact with the acetylcholinesterase enzyme in the synaptic cleft, preventing the breakdown of acetylcholine into choline and acetate. Consequently, the concentration of acetylcholine in the synaptic cleft increases. These agonists can be classified into reversible and irreversible inhibitors based on their duration of action.
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
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Diazonium Group Substitution: –OH and –H01:19

Diazonium Group Substitution: –OH and –H

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Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
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Updated: Feb 25, 2026

Humanized Mediator Release Assay as a Read-Out for Allergen Potency
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Humanized Mediator Release Assay as a Read-Out for Allergen Potency

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HISTAMINE RELEASE AND CHANDONIUM IODIDE.

Y V Suri1, B B Nayak2, M Jaiprakash3

  • 1Senior Adviser (Anaesthesiology), Command Hospital Western Command, Chandimandir.

Medical Journal, Armed Forces India
|August 4, 2017
PubMed
Summary
This summary is machine-generated.

Chandonium iodide is a safe neuromuscular blocking agent, unlike d-tubocurarine, which showed significant histamine release in animal and human studies. This study compared the histamine releasing activity of both drugs.

Keywords:
Chandonium iodideHistamine releasing activityNeuromuscular blocking agent

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Area of Science:

  • Pharmacology
  • Anesthesiology
  • Clinical Toxicology

Background:

  • Neuromuscular blocking agents are crucial in anesthesia.
  • Histamine release is a potential side effect of some neuromuscular blocking agents.
  • Chandonium iodide and d-tubocurarine are neuromuscular blocking agents with different safety profiles.

Purpose of the Study:

  • To compare the histamine releasing activity of chandonium iodide and d-tubocurarine.
  • To evaluate the safety of chandonium iodide as a neuromuscular blocking agent.

Main Methods:

  • In vitro studies using guinea pig ileum.
  • In vivo studies using guinea pig peritoneum.
  • Intradermal testing in human volunteers at dilutions of 1:1,000 and 1:10,000.

Main Results:

  • d-tubocurarine demonstrated significant histamine releasing activity in vivo and a high incidence of positive intradermal reactions in humans (53.5% and 13.5%).
  • Chandonium iodide exhibited no histamine releasing activity in either animal models or human subjects.
  • Chandonium iodide was found to be a safe neuromuscular blocking agent.

Conclusions:

  • Chandonium iodide is a safe neuromuscular blocking agent with minimal risk of histamine release.
  • d-tubocurarine possesses significant histamine releasing properties, necessitating caution during clinical use.